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karst Articles

The results of location of karst wells and probable hydraulic connections between them in limestone massif using the refraction tomography are presented. Seismic modeling was based on refraction horizon recognition in the first stage and tomographic processing of P-wave and S-wave velocity changes in the second one. The studies were carried out on the terrain neighboring to the wall of abandoned ...

Karst aquifers have complex and original characteristics which make them very different from other aquifers: high heterogeneity created and organised by groundwater flow, large voids, high flow velocities up to several hundreds of m/h, high flow rate springs up to some tens of m3/s. Different conceptual models, known from the literature, attempt to take into account all these particularities. The ...

Abstract Coalfields in North China encompass more than ten Provinces. They contain six to seven coal seams in the Permo-Carboniferous strata. The lower three seams account for 37% of the total reserves and are threatened with intrusion of karst water from the underlying Ordovician limestone. Hundreds of water inrush incidences have occurred, in which a large amount of water suddenly flows ...

Abstract: Electrical resistance heating (ERH) was used for the thermal remediation of two sites at Redstone Arsenal (RSA) near Huntsville, Alabama. Both sites feature karst limestone with heavy clay overburden. The two sites are located about five miles (10 km) apart, but differ considerably in the characteristics of the limestone. At site RSA-053, the heavy clay is underlain by very hard, ...

The estimation of the groundwater recharge in a karstic system becomes an important challenge due to the great hydrodynamic variability in both time and space. This paper proposes a two reservoir conceptual model to simulate inflow into both the conduit system and the fissure network system based on the analysis of the spring hydrograph. The structure of the model and the governing equations are ...

Abstract Coalfields in North China encompassing more than ten Provinces contain six to seven coal seams in the Permo-Carboniferous strata. The lower three seams, accounting for 37% of the total reserves, are threatened with karst water from the underlain Ordovician limestone. Hundreds of water inrush incidences have occurred in which a large amount of water suddenly flows into tunnels or working ...

Abstract - The paper describes ground penetrating radar (GPR) survey in karst area of PodilTya in Ternopil region, Ukraine that was fulfilled during 2005 year. The GPR examination was made in Ulashkovska and Mlynky caves. The GPR was applied in Ozernaya cave for unknown cavities location. Owing to the GPR survey new gallery was discovered. The research demonstrates an efficiency of the GPR ...

ABSTRACT A pilot study to evaluate an innovative in situ treatment technology was implemented at Letterkenny Army Depot, Chambersburg, Pennsylvania, for a limestone bedrock aquifer contaminated with chlorinated solvents. This technology destroys VOCs in groundwater, utilizing a network of injection points to deliver a solution of hydrogen peroxide (50%), catalysts, and surfactants. The ...

By analysing the hydrographs of karst basin outflow, it is possible to identify aquifer characteristics and, accordingly, the main features of a karst basin. In this study, 19 basins with daily observed flow discharges during drought periods between October and April 1973–1983 were selected to analyse the master recession curve (MRC). During a drought period, the MRCs were separated into segments ...

Climate change may increase the incidence of waterborne diseases due to extreme rainfall events, and consequent microbiological contamination of the water source and supply. As a result of the complexity of the pathways from the surface to the consumer, it is difficult to detect an association between rainfall and human disease. The water supply of a Hungarian city, Miskolc (174,000 inhabitant), ...

The karst landscapes of southern Italy, even though they show a lack or scarce presence of water at the surface, host a variety of ancient hydraulic works realized to collect and store water resources, to the advantage of the local settlements and for agricultural purposes as well. Ancient populations were forced to gain a deep knowledge of the territory in order to exploit the few available ...

Because spring water quality from alpine karst aquifers can change very rapidly during event situations, water abstraction management has to be performed in near real-time. Four summer events (2005–2008) at alpine karst springs were investigated in detail in order to evaluate the spectral absorption coefficient at 254 nm (SAC254) as a real-time early warning proxy for faecal pollution. For the ...

Metal mining activities often lead to plant and soil contamination in the surrounding environment. This article characterises the contaminated site and the effects of acidification and heavy metal pollution on two plant species: European birch and Norway spruce. The research was conducted in the surroundings of a former polymetalic mine near the town of Zlate Hory, Czech Republic. A by-product of ...

Industrial Facility, Tennessee An environmental assessment and remediation design project was conducted at a chemical manufacturing facility in eastern Tennessee. As part of the project, GeoView was asked to determine the depth to limestone bedrock underlying the project site and identify any suspected karst features within the upper portion of the limestone stratum. ...

ABSTRACTWe compared serological responses to Cryptosporidium parvum antigens using surplus sera from females undergoing routine screening for pregnancy from three counties in Hungary where bank-filtered surface water, conventionally filtered and disinfected surface water, and groundwater from either a karst or confined aquifer are commonly used for drinking water. The primary purpose was to ...

The district of Gunungkidul on Java Island in Indonesia is affected by an acute water shortage, especially during dry seasons. Because of its karst topography, rainfall percolates rapidly into underground caves, limiting surface storage. As a consequence, potential sources of water to supply the local population are rainwater and water derived from underground caves. However, water availability ...

Defining aquifer permeability distribution accurately over large areas is often debated in hydrogeology. The operational efforts to calculate hydraulic conductivity with classical aquifer tests are significant; however, accurate knowledge of permeability areal distribution is fundamental both from a hydrogeological and a modeling standpoint. This paper presents an empirical relationship between ...

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